Just bought an EVGA gtx 760, i also upgraded my power supply to a cooler master ex2 625w (for the expressed purpose of gpu upgrade)
i don't think it matters but here are the rest of my specs:
Gigabyte P75-d3 motherboard
8gb hyperx ram ddr3
intel i3-2120
2tb seagate barracuda 7200rpm
windows 8.1...